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Passive Q-switched pulse laser based on graphene and silicon mixed waveguide

A technology of pulsed lasers and graphene, applied in lasers, laser components, phonon exciters, etc., can solve problems such as complex process, difficult control of graphene saturated absorption parameters, easy damage of graphene saturable absorbers, etc., to achieve The effect of simple structure

Inactive Publication Date: 2018-10-26
HUAZHONG UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a passive Q-switched pulsed laser based on graphene and silicon hybrid waveguide, thereby solving the problems of complex process, easy damage of graphene saturable absorber and The quality of graphene is difficult to monitor, and the technical problems of graphene's saturated absorption parameters are difficult to control

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  • Passive Q-switched pulse laser based on graphene and silicon mixed waveguide
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  • Passive Q-switched pulse laser based on graphene and silicon mixed waveguide

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0026] Such as figure 1 As shown, a kind of passive Q-switched pulsed laser based on graphene and silicon hybrid waveguide provided by the embodiment of the present invention, erbium-doped fiber amplifier 1, optical isolator 2, polarization controller 3, vertical coupling platform 4, graphite connected in sequence Graphene and silicon hybrid waveguide 6, fiber output coupler 7, the two ends of ...

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Abstract

The invention discloses a passive Q-switched pulse laser based on a graphene and silicon mixed waveguide. The laser comprises an Er-doped fiber amplifier, an opto-isolator, a polarization controller,a graphene and silicon mixed waveguide, and a fiber output coupler. Vertical coupling optical gratings are arranged on two ends of the graphene and silicon mixed waveguide. The optical gratings are connected with an external fiber system through a coupling fiber. One end of the fiber coupler serves as a pulse laser output end and the other end is connected with the input end of the Er-doped fiberamplifier, thereby forming an annular cavity structure. According to the invention, the laser is simple in structure; it is difficult to damage a graphene saturable absorber; it is easy to monitor thequality of graphene; and the saturation absorption parameters of the graphene can be adjusted and monitored.

Description

technical field [0001] The invention belongs to the field of pulsed light sources, and more specifically relates to a passive Q-switched pulsed laser based on graphene and silicon hybrid waveguides. Background technique [0002] Ultrashort pulse light sources have extremely important applications in various fields such as communications, biomedicine, and national defense. The generation of ultrashort pulses is mainly based on mode-locking technology and Q-switching technology. Q-switched lasers can generate pulsed lasers with a pulse width ranging from microseconds to nanoseconds, and the energy of a single pulse is generally tens to hundreds of nanojoules. [0003] Q-switching can be roughly divided into electro-optic Q-switching, acousto-optic Q-switching, and passive saturable absorber Q-switching. Both of the former two belong to the category of active Q-switching, and require an external modulator to control the loss of the laser resonator, which has the disadvantages ...

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Application Information

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IPC IPC(8): H01S3/11
CPCH01S3/11H01S3/1115
Inventor 汪毅刘国琴戴能利侯绍冬
Owner HUAZHONG UNIV OF SCI & TECH